Quote:
Originally Posted by WingsofWar
The Output volume doesn't depend on exhaust pipe..its the total exhaust volume that the engine puts out. Typically smaller engines don't give big exhaust pulses. Biggest you should ever go on a small engine, small displacement, N/A is a 2.5 in pipe...you can push 2.75 but your risking performance. A 3 inch exhaust will rape your low end torque band and ultimately rob you of power.
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This depends on how fancy you want to get with your header/exhaust design. The general max size of your piping is based on your power requirements. But if that diameter doesn't jive with your primary/secondary tube tuning for scavenging, you can build a pressure-wave termination box, so the final exhaust diameter doesn't affect the pulse scavenging.
This would be on a full-race setup though.
As for the single/dual, for me it will probably be single as I anticipate using a 4-1 merge collector or a 4-2-1 with super short secondary merge collector for my header design.